BO Manufacture FABARM Licensed STF12 18 inch Ressort Spring Shotgun: specs, joules & FPS
Partial data BO Manufacture Spring
BO Manufacture FABARM Licensed STF12 18 inch Ressort Spring Shotgun: 0.89 J, 310 FPS, 1,840 g, 30 rounds. Official specs.
Power
Within Italy's 1 J limit
Estimated energy: the source does not give the BB weight, so we used 0.20 g, the standard weight manufacturers and shops use to measure velocity. With other BBs the value changes: always check with a chronograph.
For information only, based on the energy the manufacturer declares for this version. Not legal advice: always check current local law and the version the shop sells.
Technical specifications
| Brand | BO Manufacture |
|---|---|
| Model | FABARM Licensed STF12 18 inch Ressort Spring Shotgun |
| Manufacturer code | n/a |
| Category | Shotguns |
| Power source | Spring |
| Platform | STF12 |
| Weight | 1,840 g |
| Length | 925 mm |
| Inner barrel | n/a |
| Magazine | 30 rounds |
| Hop-up | Fixed |
| EAN / UPC | n/a |
Velocity with different BB weights
At the same energy, heavier BBs leave the barrel slower. Expected velocity with the most common weights:
| BB weight | FPS | m/s |
|---|---|---|
| 0.20 g | 310 | 94 |
| 0.25 g | 277 | 85 |
| 0.28 g | 262 | 80 |
| 0.30 g | 253 | 77 |
| 0.32 g | 245 | 75 |
| 0.36 g | 231 | 70 |
| 0.40 g | 219 | 67 |
Theoretical calculation at constant energy (0.89 J). Real-world values can differ slightly with hop-up and replica.
Data source
The values on this page come from the product page of the shop redwolfairsoft.com, checked on 2026-11-07. The manufacturer does not publish full specs: values may refer to the version that shop sells.
Shop product page ↗ redwolfairsoft.com
Not declared by the manufacturer: Inner barrel.
Available colours
The same model is also sold in these colours. The specs on this page refer to the first version; each colour links to its own page at the source.